Remove hint about Config.md from PR template

[stefanhaller]

It used to be a common thing to have to update Config.md in a PR (and we often forgot despite the template). As of #3565 this is no longer necessary, so remove this from the template.

Updating docs in general is still a good thing to think about, so we leave this in.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for fc7b10f1	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (fc7b10f)	Report Missing	Report Missing	Report Missing
Head commit (f5d57f7)	51186	43107	84.22%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#3578)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

_{Codacy will stop sending the deprecated coverage status from June 5th, 2024. Learn more}

Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[jesseduffield]

Nice one. Feels great to not have to separately update Config.md anymore when you add a new keybinding or config option